Read More

In December 2006, he told them he was not in a relationship, which he repeated in 2011 and 2015.

Then in February 2016 he claimed he had not had a relationship since leaving hospital in 1997.

Judge Marks added: "That condition was imposed for a very good reason.

"The consequences of those lies is that the authorities weren't in a position to tell Ms Best about your past.

"The attack perpetrated by you on Angela Best was sustained, vicious and utterly brutal.

"She suffered an unimaginable, terrible death."

In a statement, the victim's sister Valerie Archbold said she was "much loved".

A post-mortem examination took place on December 16, 2016, at the Whittington Hospital Mortuary. Cause of death was given as neck compression by strangulation with a ligature and blunt force trauma to the head.

Johnson was arrested and charged on January 19, 2017, for the murder of Angela Best.

Detective Sergeant Danny Yeoman, from the Met’s Homicide and Major Crime Command, said: "Johnson is a dangerous individual and the streets of London are now a safer place with him behind bars.

"This was a vicious attack and I hope the sentencing gives Angela’s family some measure of comfort and closure."